As used in sections three hundred and fifteen through three hundred and eighteen, inclusive, the following words and phrases shall, unless the context otherwise requires, have the following meanings:—
''Appliance'', an air conditioner, refrigerator, freezer or refrigerator-freezer which is not used or secondhand;
''Class of appliances'', all appliances performing similar functions;
''Consumer'', a person who purchases an appliance for use by himself or others and not for resale as a new appliance;
''Deputy director'', the deputy director of standards;
''Director'', the director of consumer affairs and business regulation;
''Subclass of appliances'', those appliances within a class of appliances which are determined by the secretary to be comparable in size, capacity or capability.